FPGA速度等级是什么

答案和链接的线程都有点不完整。
这是一个不同的答案：
对于每个器件系列，数据表中定义和指定了不同的性能速度等级。
您从Xilinx或其授权分销链购买的任何设备都将在工厂进行测试，以至少符合设备数据表中保证的性能特性，以确保部件上标记的速度等级。
零件上标记的速度等级与零件的实际速度无关，只是零件已经过测试到特定的速度等级。
标记为最慢速度等级的单个部件可能比标记为最快速度等级的另一部件更快。
换句话说，设备上标记的速度等级描述了设备的最低保证性能，而不是其最大性能。
这种“速度等级”的定义和描述是许多半导体制造商的典型特征。
我希望这有帮助。
- 鲍勃埃尔金德
签名：新手的自述文件在这里：http：//forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369总结：1。
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在原帖中查看解决方案



以下为原文

The answers and the linked thread are all a bit incomplete.  Here is a different answer:
 

• For each device family, there are different performance speed grades defined and specified in the datasheet.
  

• Any device you purchase from Xilinx or its authorised distribution chain will be tested at the factory to comply -- at a minimum -- with the guaranteed performance characteristics in the device datasheet for the speed grade marked on the part.
  

• The speed grade marked on the part has nothing whatsoever to do with the actual speed of the part, only that the part has been tested to that specific speed grade.  An individual part which is marked for the slowest speed grade may be faster than another part marked for the fastest speed grade.  In other words, the speed grade marked on a device describes the minimum guaranteed performance of the device, not its maximum performance.
  

• This definition and description of 'speed grade' is typical of many semiconductor manufacturers.
  

I hope this helps.
 
-- Bob Elkind
SIGNATURE:
README for newbies is here: http://forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369

Summary:
1. Read the manual or user guide.  Have you read the manual? Can you find the manual?
2. Search the forums (and search the web) for similar topics.
3. Do not post the same question on multiple forums.
4. Do not post a new topic or question on someone else's thread, start a new thread!
5. Students: Copying code is not the same as learning to design.
6 "It does not work" is not a question which can be answered. Provide useful details (with webpage, datasheet links, please).
7. You are not charged extra fees for comments in your code.
8. I am not paid for forum posts.  If I write a good post, then I have been good for nothing.View solution in original post

它们表示fpga的速度等级;-)它们实际意味着什么在本文档中显示：http：//www.xilinx.com/support/documentation/data_sheets/ds202.pdf如果你去，比如说，页面
28 a 16x1多路复用器在550 MHz下运行-3，但仅在450 MHz下运行-1分。
- 如果提供的信息有用，请将答案标记为“接受为解决方案”。给予您认为有用且回复的帖子。



以下为原文

They are an indication of the speed grade of the fpga ;-)

What they actually mean are shown in this document: http://www.xilinx.com/support/documentation/data_sheets/ds202.pdf

If you go to, say, page 28 a 16x1 multiplexer runs at 550 MHz for -3 but only at 450 MHz for a -1 part.
- Please mark the Answer as "Accept as solution" if information provided is helpful.
Give Kudos to a post which you think is helpful and reply oriented.

嗨，
请查看此论坛帖子。
http://forums.xilinx.com/t5/CPLDs/Speed-Grade/td-p/3052
谢谢，AnirudhPS：请将此标记作为答案，以防它有助于解决您的问题。如果帖子引导您找到解决方案，请给予赞誉。



以下为原文

Hi,
 
Please check this forum post.
 
http://forums.xilinx.com/t5/CPLDs/Speed-Grade/td-p/3052
 
 
 
Thanks,
Anirudh

PS: Please MARK this as an answer in case it helped resolve your query.Give kudos in case the post guided you to a solution.

答案和链接的线程都有点不完整。
这是一个不同的答案：
对于每个器件系列，数据表中定义和指定了不同的性能速度等级。
您从Xilinx或其授权分销链购买的任何设备都将在工厂进行测试，以至少符合设备数据表中保证的性能特性，以确保部件上标记的速度等级。
零件上标记的速度等级与零件的实际速度无关，只是零件已经过测试到特定的速度等级。
标记为最慢速度等级的单个部件可能比标记为最快速度等级的另一部件更快。
换句话说，设备上标记的速度等级描述了设备的最低保证性能，而不是其最大性能。
这种“速度等级”的定义和描述是许多半导体制造商的典型特征。
我希望这有帮助。
- 鲍勃埃尔金德
签名：新手的自述文件在这里：http：//forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369总结：1。
阅读手册或用户指南。
你读过手册了吗？
你能找到手册吗？2。
搜索论坛（并搜索网页）以寻找类似的主题。
不要在多个论坛上发布相同的问题。
不要在别人的主题上发布新主题或问题，开始新的主题！5。
学生：复制代码与学习设计不同.6“它不起作用”不是一个可以回答的问题。
提供有用的详细信息（请与网页，数据表链接）.7。
您的代码中的评论不需要支付额外费用。
我没有支付论坛帖子的费用。
如果我写一篇好文章，那么我一无所获。



以下为原文

The answers and the linked thread are all a bit incomplete.  Here is a different answer:
 

• For each device family, there are different performance speed grades defined and specified in the datasheet.
  

• Any device you purchase from Xilinx or its authorised distribution chain will be tested at the factory to comply -- at a minimum -- with the guaranteed performance characteristics in the device datasheet for the speed grade marked on the part.
  

• The speed grade marked on the part has nothing whatsoever to do with the actual speed of the part, only that the part has been tested to that specific speed grade.  An individual part which is marked for the slowest speed grade may be faster than another part marked for the fastest speed grade.  In other words, the speed grade marked on a device describes the minimum guaranteed performance of the device, not its maximum performance.
  

• This definition and description of 'speed grade' is typical of many semiconductor manufacturers.
  

I hope this helps.
 
-- Bob Elkind
SIGNATURE:
README for newbies is here: http://forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369

Summary:
1. Read the manual or user guide.  Have you read the manual? Can you find the manual?
2. Search the forums (and search the web) for similar topics.
3. Do not post the same question on multiple forums.
4. Do not post a new topic or question on someone else's thread, start a new thread!
5. Students: Copying code is not the same as learning to design.
6 "It does not work" is not a question which can be answered. Provide useful details (with webpage, datasheet links, please).
7. You are not charged extra fees for comments in your code.
8. I am not paid for forum posts.  If I write a good post, then I have been good for nothing.

谢谢大家...所有答案都有很大帮助。
;）



以下为原文

Thank you all... All the answers helped a lot. ;)